LWJGL 3.3.3 · org.lwjgl.glfw.GLFWDeallocateCallbackI

The function pointer type for memory deallocation callbacks.

This is the function pointer type for memory deallocation callbacks. A memory deallocation callback function has the following signature:


void function_name(void* block, void* user)

This function may deallocate the specified memory block. This memory block will have been allocated with the same allocator.

This function may be called during Init but before the library is flagged as initialized, as well as during Terminate after the library is no longer flagged as initialized.

The block address will never be NULL. Deallocations of NULL are filtered out before reaching the custom allocator.

Note

The specified memory block will not be accessed by GLFW after this function is called.
This function should not call any GLFW function.
This function may be called from any thread that calls GLFW functions.

Type


void (*invoke) (
    void *block,
    void *user
)

Field Summary

Modifier and Type	Field and Description
public static final FFICIF	CIF

Method Summary

Modifier and Type	Method and Description
public default void	callback(long a pointer to the memory used for the function's return value. If the function is declared as returning `void`, then this value is garbage and should not be used. Otherwise, the callback must fill the object to which this points, following the same special promotion behavior as `LibFFI#ffi_call`. That is, in most cases, `ret` points to an object of exactly the size of the type specified when `CIF` was constructed. However, integral types narrower than the system register size are widened. In these cases your program may assume that `ret` points to an `ffi_arg` object. ret, long a vector of pointers to memory holding the arguments to the function args) Implements org.lwjgl.system.CallbackI.callback. The Java method that will be called from native code when the native callback function is invoked.
public default FFICIF	getCallInterface() Implements org.lwjgl.system.CallbackI.getCallInterface. Returns the libffi Call Interface for this callback function.
public void	invoke(long the address of the memory block to deallocate block, long the user-defined pointer from the allocator user) Will be called for memory deallocation requests.

Inherited from org.lwjgl.system.CallbackI:: address

Field Detail

CIF	back to summary
public static final FFICIF CIF

Method Detail

callback back to summary

callback	back to summary
public default void callback(long ret, long args) Implements org.lwjgl.system.CallbackI.callback. Doc from org.lwjgl.system.CallbackI.callback. The Java method that will be called from native code when the native callback function is invoked. Parameters ret:long a pointer to the memory used for the function's return value. If the function is declared as returning `void`, then this value is garbage and should not be used. Otherwise, the callback must fill the object to which this points, following the same special promotion behavior as `LibFFI#ffi_call`. That is, in most cases, `ret` points to an object of exactly the size of the type specified when `CIF` was constructed. However, integral types narrower than the system register size are widened. In these cases your program may assume that `ret` points to an `ffi_arg` object. args:long a vector of pointers to memory holding the arguments to the function Annotations @Override

public default void callback(long ret, long args)

Implements org.lwjgl.system.CallbackI.callback.

Doc from org.lwjgl.system.CallbackI.callback.

The Java method that will be called from native code when the native callback function is invoked.

Parameters

ret:long

a pointer to the memory used for the function's return value.

If the function is declared as returning void, then this value is garbage and should not be used.

Otherwise, the callback must fill the object to which this points, following the same special promotion behavior as LibFFI#ffi_call. That is, in most cases, ret points to an object of exactly the size of the type specified when CIF was constructed. However, integral types narrower than the system register size are widened. In these cases your program may assume that ret points to an ffi_arg object.

args:long

a vector of pointers to memory holding the arguments to the function

Annotations

@Override

getCallInterface	back to summary
public default FFICIF getCallInterface() Implements org.lwjgl.system.CallbackI.getCallInterface. Doc from org.lwjgl.system.CallbackI.getCallInterface. Returns the libffi Call Interface for this callback function. [INTERNAL API] Returns:FFICIF the CIF structure for this callback function Annotations @Override

getCallInterface

back to summary

public default FFICIF getCallInterface()

Implements org.lwjgl.system.CallbackI.getCallInterface.

Doc from org.lwjgl.system.CallbackI.getCallInterface.

Returns the libffi Call Interface for this callback function. [INTERNAL API]

Returns:FFICIF

the CIF structure for this callback function

Annotations

@Override

invoke	back to summary
public void invoke(long block, long user) Will be called for memory deallocation requests. Parameters block:long the address of the memory block to deallocate user:long the user-defined pointer from the allocator

invoke